flectra/addons/google_calendar/views/res_config_settings_views.xml

<?xml version="1.0" encoding="utf-8"?>
<flectra>
        <record id="res_config_settings_view_form" model="ir.ui.view">
            <field name="name">res.config.settings.view.form.inherit.google.calendar</field>
            <field name="model">res.config.settings</field>
            <field name="inherit_id" ref="base_setup.res_config_settings_view_form"/>
            <field name="arch" type="xml">
                <div id="msg_module_google_calendar" position="replace">
                    <div class="content-group" attrs="{'invisible': [('module_google_calendar','=',False)]}">
                        <div class="mt16 row">
                            <label for="cal_client_id" string="Client ID" class="col-xs-3 col-md-3 o_light_label"/>
                            <field name="cal_client_id" nolabel="1"/>
                            <label for="cal_client_secret" string="Client Secret" class="col-xs-3 col-md-3 o_light_label"/>
                            <field name="cal_client_secret" password="True" nolabel="1"/>
                        </div>
                        <a href="https://userdoc.flectrahq.com/crm/optimize/google_calendar_credentials.html" class="oe-link" target="_blank"><i class="fa fa-fw fa-arrow-right"/>Tutorial</a>
                    </div>
                </div>
            </field>
        </record>

        <record id="action_config_settings_google_calendar" model="ir.actions.act_window">
            <field name="name">Settings</field>
            <field name="type">ir.actions.act_window</field>
            <field name="res_model">res.config.settings</field>
            <field name="view_mode">form</field>
            <field name="context">{'module' : 'general_settings'}</field>
            <field name="target">inline</field>
        </record>

        <menuitem id="menu_calendar_google_tech_config"
            name="API Credentials"
            parent="calendar.menu_calendar_configuration"
            groups="base.group_no_one"
            action="action_config_settings_google_calendar"/>

</flectra>